Figure 2.
Stereo pair showing that the backbone structures of L20/R63A
lysozyme complexed with guanidinium ion (red), methylguanidinium
(yellow), and ethylguanidinium (green) are virtually identical.
The structure of L20/R63A in the absence of ligand (cyan)
differs substantially.
The above figure is reprinted
from an Open Access publication published by the Protein Society:
Protein Sci
(2006,
15,
853-861)
copyright 2006.